of course... and that is because they all have rin-tin-tin blood in them.
i should know; i had gsd-s all my life, i have one girl now - she used to be house dog but i had to kennel her after my phone bills started to get too big.
I could tell my dog how 'to sniff out bombs, drugs and fireworks" but, hey, why bother when i can give her book to read